CN108776272A - A kind of test system of frequency conversion equipment Electro Magnetic Compatibility - Google Patents
A kind of test system of frequency conversion equipment Electro Magnetic Compatibility Download PDFInfo
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- CN108776272A CN108776272A CN201810522301.9A CN201810522301A CN108776272A CN 108776272 A CN108776272 A CN 108776272A CN 201810522301 A CN201810522301 A CN 201810522301A CN 108776272 A CN108776272 A CN 108776272A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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Abstract
The embodiment of the present invention provides a kind of test system of frequency conversion equipment Electro Magnetic Compatibility, is related to frequency conversion equipment test equipment field, can accurately test out the Electro Magnetic Compatibility of high-power frequency conversion equipment.The system includes：Semi-anechoic chamber, the test platform being arranged in semi-anechoic chamber, the reception antenna being arranged in semi-anechoic chamber and the power supply being placed on outside semi-anechoic chamber；The one end for the input power interface being arranged on test platform connects the input terminal of frequency conversion equipment to be measured, the one end for the out-put supply interface being arranged on the output end connecting test platform of frequency conversion equipment to be measured；Power supply is connected to the other end of input power interface, for powering for input power interface；The other end connection of out-put supply interface is placed on the test load equipment outside semi-anechoic chamber, and the load of test load equipment is adjustable；Reception antenna is connected to the receiver placed outside semi-anechoic chamber, and the radiated transmission power for detecting frequency conversion equipment to be measured is simultaneously sent to receiver.
Description
Technical field
The present invention relates to frequency conversion equipment testing field more particularly to a kind of test systems of frequency conversion equipment Electro Magnetic Compatibility
System.
Background technology
With the rapid development of power electronics and control technology, electrical equipment is applied increasingly wider in underground coal mine
It is general, force downhole electromagnetic environment increasingly severe.The mine high-power under mine is found from point of theory analysis and field survey
The radiation-emitting harassing and wrecking situation of frequency conversion equipment is more serious, interferes, has to being operated in its a certain range of sensitive equipment
It may result in it to restart or shut down, and then be possible to that catastrophic effect can be caused to Safety of Coal Mine Production.
China's coal-mine industry starts late to the research of Electro Magnetic Compatibility, only proposes in some coal mines so far
The immunity to interference of frequency conversion equipment requires and test method.Radiation-emitting harassing and wrecking to mine variable-frequency equipment and unreferenced or proposition
Related limit value, and field survey is usually used in its radiation emission measurement method or is measured in open space, because this
Sample can not avoid the influence of outer bound pair frequency conversion equipment and test equipment in operation, so measuring result error is larger, not enough
Accurately.
Invention content
The embodiment of the present invention provides a kind of test system of frequency conversion equipment Electro Magnetic Compatibility, for high-power frequency conversion
Installation electromagnetical is compatible with the detection of performance.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, a kind of test system of frequency conversion equipment Electro Magnetic Compatibility is provided, including：Semi-anechoic chamber, setting
Test platform, the reception antenna being arranged in semi-anechoic chamber in semi-anechoic chamber and the electricity being placed on outside semi-anechoic chamber
Source；
The one end for the input power interface being arranged on test platform connects the input terminal of frequency conversion equipment to be measured, and frequency conversion to be measured is set
The one end for the out-put supply interface being arranged on standby output end connecting test platform；
Power supply is connected to the other end of input power interface, for powering for input power interface；
The other end connection of out-put supply interface is placed on the test load equipment outside semi-anechoic chamber, test load equipment
Load it is adjustable；
Reception antenna is connected to the receiver placed outside semi-anechoic chamber, the radiation-emitting for detecting frequency conversion equipment to be measured
Power is simultaneously sent to receiver.
Optionally, system further includes input electromagnetic interface filter；
It inputs EMI FILTER to be arranged between power supply and input power interface, and outside semi-anechoic chamber.
Optionally, system further includes sinusoidal filter and output EMI FILTER；
Sinusoidal filter is arranged between test load equipment and out-put supply interface, output EMI FILTER setting
Between sinusoidal filter and test load equipment；
Sinusoidal filter and output EMI FILTER are located at outside semi-anechoic chamber.
Optionally, power supply is additionally operable to obtain the operating parameter of frequency conversion equipment to be measured and judges frequency conversion to be measured according to operating parameter
Whether equipment operation is normal；
If normal, then continue to power, then stop powering if abnormal,；
Operating parameter includes at least：Input voltage, input current, input power factor, output voltage and output current.
Optionally, reception antenna is additionally operable to the background environment electromagnetic noise measured in semi-anechoic chamber and is sent to reception
Machine.
Optionally, system further includes the first screened room；
It includes receiver that first screened room, which is arranged on the outer wall of semi-anechoic chamber and in the first screened room,.
Optionally, system further includes secondary shielding room；
Secondary shielding room is arranged on the outer wall of semi-anechoic chamber, and includes input EMI Filtering in secondary shielding room
Device, sinusoidal filter and output EMI FILTER.
Optionally, system further includes change-over switch；
The other end of the output end connection input power interface of change-over switch, the first input end connection input of change-over switch
Second input terminal of EMI FILTER, change-over switch connects power supply；
Whether change-over switch is used to determine the electric energy of power supply offer by entering input electricity after input EMI FILTER
Source interface.
Optionally, system further includes：The water-cooling apparatus that is placed on outside semi-anechoic chamber is placed on outside semi-anechoic chamber
Water waveguide and the cooling water connector being arranged in semi-anechoic chamber；
Water-cooling apparatus connects water waveguide, and water waveguide connects the input terminal of cooling water connector, the output end of cooling water connector
It is connected to the coolant interface of frequency conversion equipment to be measured.
Preferably, test platform is rotating platform.
The test system of frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention, the system include：Half electric wave is dark
Room, the test platform being arranged in semi-anechoic chamber, the reception antenna being arranged in semi-anechoic chamber and to be placed on half electric wave dark
Outdoor power supply；The one end for the input power interface being arranged on test platform connects the input terminal of frequency conversion equipment to be measured, change to be measured
The one end for the out-put supply interface being arranged on the output end connecting test platform of frequency equipment；Power supply is connected to input power interface
The other end, for powering for input power interface；The other end connection of out-put supply interface is placed on the survey outside semi-anechoic chamber
Load equipment is tried, the load of test load equipment is adjustable；Reception antenna is connected to the receiver placed outside semi-anechoic chamber, is used for
It detects the radiated transmission power of frequency conversion equipment to be measured and is sent to receiver.In technical solution provided in an embodiment of the present invention, make
The environment to be worked with darkroom simulated frequency conversion equipment or open scene, frequency conversion equipment is tested dark using reception antenna and receiver
The radiated transmission power that room generates when running, to understand the Electro Magnetic Compatibility of the frequency conversion equipment for tester；Darkroom mould
Quasi- environment can fully avoid influence of the external environment to test process, improve the precision of test result；In addition, also using negative
It carries adjustable test load equipment and is connected to the delivery outlet of the frequency conversion equipment, and then the frequency conversion equipment can be tested from zero load to completely
All radiation-emitting situations during load determine that the Electro Magnetic Compatibility of the frequency conversion equipment provides more fully for tester
Data supporting.To sum up, the test system of frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention, can be to being applied to coal
High-power frequency conversion equipment in mine carries out the detection of radiation-emitting situation under full power state, and test result is also more than the prior art
It is accurate.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of test system structure schematic diagram of frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention；
Fig. 2 is the test system structure signal of another frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention
Figure.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It should be noted that in the embodiment of the present invention, " illustrative " or " such as " etc. words make example, example for indicating
Card or explanation.Be described as in the embodiment of the present invention " illustrative " or " such as " any embodiment or design scheme do not answer
It is interpreted than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.
It should also be noted that, the embodiment of the present invention in, " (English：Of) ", " corresponding (English：
Corresponding, relevant) " and " corresponding (English：Corresponding it) " can use with sometimes, it should be pointed out that
It is that, when not emphasizing its difference, meaning to be expressed is consistent.
For the ease of clearly describing the technical solution of the embodiment of the present invention, in an embodiment of the present invention, use " the
One ", the printed words such as " second " distinguish function and the essentially identical identical entry of effect or similar item, and those skilled in the art can
To understand that the printed words such as " first ", " second " are not to be defined to quantity and execution order.
The radiation-emitting of the high-power frequency conversion equipment used in coal mine in practice harasses situation than more serious, easily causes to become
Sensitive equipment near frequency equipment breaks down, to cause very big hidden danger to coal mine production safety, so for frequency conversion equipment
Electro Magnetic Compatibility test it is inevitable, but existing testing scheme is to place it in coal mine or open space
In tested, the precision of test result is not ideal enough.
In view of the above-mentioned problems, shown in referring to Fig.1, the embodiment of the present invention provides a kind of survey of frequency conversion equipment Electro Magnetic Compatibility
Test system, including：
Semi-anechoic chamber 11, the test platform 12 being arranged in semi-anechoic chamber, the reception being arranged in semi-anechoic chamber
Antenna 13 and the power supply 14 being placed on outside semi-anechoic chamber；
In embodiments of the present invention in order to more accurate simulation test environment, so used in the embodiment of the present invention
Semi-anechoic chamber is 10 meters of method specifications；
The one end for the input power interface 121 being arranged on test platform 12 connects the input terminal of frequency conversion equipment 15 to be measured, waits for
Survey the one end for the out-put supply interface 122 being arranged on the output end connecting test platform 12 of frequency conversion equipment 15；
Power supply is connected to the other end of input power interface 121, for powering for input power interface 121；
The other end connection of out-put supply interface 122 is placed on the test load equipment 16 outside semi-anechoic chamber 11, test
The load of load equipment 16 is adjustable；It should be noted that class there are many kinds of the loads that the test load equipment provides, actual test mistake
Cheng Zhong, tester can choose suitable load type according to the parameter of frequency conversion equipment itself；
Reception antenna 13 is connected to the receiver 17 placed outside semi-anechoic chamber 11, for detecting frequency conversion equipment 15 to be measured
Radiated transmission power is simultaneously sent to receiver 17；Reception antenna in practice in semi-anechoic chamber there may be multiple, in Fig. 1
Only a kind of embodiment, is limited not to this.
Optionally, the available power specification of power supply provided in the embodiment of the present invention includes：3.3kV alternating currents, 6kV are handed over
Galvanic electricity, 10kV alternating currents and 1.5kV direct currents etc..
The environment to be worked using darkroom simulated frequency conversion equipment in the technical solution that above-described embodiment provides or open scene,
The radiated transmission power that frequency conversion equipment is generated when darkroom is run is tested using reception antenna and receiver, to for tester
Member understands the Electro Magnetic Compatibility of the frequency conversion equipment；The environment of darkroom simulation fully can avoid external environment to test process
It influences, improves the precision of test result；In addition, being also connected to the defeated of the frequency conversion equipment using the adjustable test load equipment of load
Outlet, and then the frequency conversion equipment can be tested from zero load radiation-emitting situation all to during being fully loaded with, it is that tester is true
The Electro Magnetic Compatibility of the fixed frequency conversion equipment provides more fully data supporting.To sum up, frequency conversion provided in an embodiment of the present invention is set
The test system of standby Electro Magnetic Compatibility, can be to carrying out spoke under full power state applied to the high-power frequency conversion equipment in coal mine
The detection of transmitting situation is penetrated, test result is also more more accurate than the prior art.
It in actual test process, because frequency conversion equipment is likely to break down at any time, and once breaks down, surveys
The data of examination are necessarily not accurate enough, and the damage that may result in frequency conversion equipment itself, so during actual test, need
Some parameters that real-time testing frequency conversion equipment is run are wanted to judge whether it is normal, normally then continue to test, it is abnormal, stop
Test, is tested again after debugging, thus optional, and power supply is additionally operable to obtain the operating parameter of frequency conversion equipment to be measured simultaneously
Judge whether frequency conversion equipment operation to be measured is normal according to operating parameter；
If normal, then continue to power, then stop powering if abnormal,；Operating parameter includes at least：Input voltage, input
Electric current, input power factor, output voltage and output current.
In practice, power supply itself has self-protection function, and in embodiments of the present invention, operating personnel can be to electricity
The protection setting in source is modified so that power supply does not meet its normal setting range in the operating parameter for measuring frequency conversion equipment to be measured
When assert and need to start self-protection at this time, to deenergization；Warning message such as sound can also be outwardly sent in practice
Sound alarm or flashing light alarm etc..
Because being environment or the open test simulated using darkroom in coal mine when frequency conversion equipment is placed in darkroom
Environment, so need to ensure that the environment in darkroom is similar with the environment of simulation without being influenced by other uncontrollable factors, and
Remaining then belongs to the Background environmental noise of this test with the various types of signal that simulated environment is not inconsistent, in entire test process, the back of the body
Scape ambient noise cannot be excessive, so optionally, the background environment electromagnetism that reception antenna is additionally operable to measure in semi-anechoic chamber is made an uproar
Sound is simultaneously sent to receiver.
Above-mentioned steps usually carry out before testing, and tester obtains the background ring in semi-anechoic chamber by receiver
Border noise, when the Background environmental noise be more than preset upper limit value when, tester just need to the environment in semi-anechoic chamber into
Its Background environmental noise of re-test after row adjustment, until starting to test after qualified (being less than or equal to preset upper limit value).
With reference to shown in Fig. 2, in order to enable the power supply that frequency conversion equipment to be measured 15 obtains is more pure, reduce external rings therein
The conduct radiation interference signal in border, so optionally, which further includes：Input EMI (Electromagnetic
Interference, electromagnetic interference) filter 18, the input electromagnetic interface filter 18 setting is in power supply 14 and input power interface 122
Between, because to test radiation effect of the frequency conversion equipment 15 to be measured to the external world itself, input EMI filters in the embodiment of the present invention
Wave device is located at outside semi-anechoic chamber 11, in case itself and frequency conversion equipment 15 to be measured interact.
With reference to shown in Fig. 2, in order to enable the electric energy that frequency conversion equipment to be measured 15 exports is more stable and pure, optionally, this is
System further includes：Sinusoidal filter 19 and output electromagnetic interface filter 20；
Sinusoidal filter 19 is arranged between test load equipment 16 and out-put supply interface 122, exports electromagnetic interface filter 20
It is arranged between sinusoidal filter 19 and test load equipment 16；
Similarly, because to test radiation effect of the frequency conversion equipment 15 to be measured to the external world itself, in the embodiment of the present invention
Sinusoidal filter 19 and output electromagnetic interface filter 20 are located at outside semi-anechoic chamber 11, to prevent the two and frequency conversion equipment to be measured 15 mutually
Mutually influence；
Wherein, sinusoidal filter 19 is used to reduce high dV/dt (voltage change ratio) and dI/ that frequency conversion equipment 15 to be measured exports
Dt (current changing rate), in order to avoid the subsequent output electromagnetic interface filter 20 of damage, and export electromagnetic interface filter 20 and be then used to make the sine
The electric energy that filter 19 transmits is purer, reduces the conduct radiation interference signal of external environment therein；
It should be short and small as possible to subtract in addition, being connected to the cable between test load equipment 16 from output electromagnetic interface filter 20
Small inductor avoids resonance from influencing test result.
Further, with reference to shown in Fig. 2, in order to ensure the accuracy of experimental result, which further includes the first screened room
21, the first screened room 21 is arranged on the outer wall of semi-anechoic chamber 11 and includes receiver 17 in the first screened room 21, this first
Screened room 21 is primarily to prevent the cable between receiver 17 and semi-anechoic chamber 11 from being caused to test by external environment influence
As a result it is not allowed.
Further, with reference to shown in Fig. 2, in order to further exclude influence of the external environment to experiment, which further includes
Secondary shielding room 22, secondary shielding room 22 are arranged on the outer wall of semi-anechoic chamber 11, and include input in secondary shielding room 22
Electromagnetic interface filter 18, sinusoidal filter 19 and output electromagnetic interface filter 20.
In practice, because the frequency conversion equipment to be measured that the present invention detects is typically all high-power equipment, EMI is inputted
The high pressure electromagnetic interface filter that filter also uses, so the considerations of being in safety, high pressure electromagnetic interface filter needs regular inspection
Repair, and during high pressure electromagnetic interface filter overhauls if it is urgent need to supply electricity to semi-anechoic chamber in input power interface,
The electric energy directly by power supply is needed to supply input power interface, so optionally, with reference to shown in Fig. 2, which further includes conversion
Switch 23；
The other end of the output end connection input power interface 121 of change-over switch 23, the first input end of change-over switch connect
Input EMI18 filters are connect, the second input terminal of change-over switch 23 connects power supply 14；
Whether change-over switch 23 is used to determine the electric energy of the offer of power supply 14 by entering input electricity after input electromagnetic interface filter 18
Source interface 121；When input electromagnetic interface filter 18 can not work, connected between the output end of change-over switch 23 and the second input terminal,
So that the electric energy that power supply provides directly feeds input power interface 121.
Optionally, because the frequency conversion equipment to be measured in the embodiment of the present invention is generally high-power frequency conversion equipment, work
Heat condition during work is more serious, needs to cool down in real time, so with reference to shown in Fig. 2, which further includes：It is placed on half
Water-cooling apparatus 24 outside anechoic chamber, 11 is placed on 11 outer water waveguide 25 of semi-anechoic chamber and is arranged in semi-anechoic chamber 11
Cooling water connector 26；Wherein, water waveguide is specifically located on the outer wall of semi-anechoic chamber, and being mainly used to allow flow can lead to
Water waveguide is crossed to enter in semi-anechoic chamber；
Water-cooling apparatus 24 connects water waveguide 25, and water waveguide 25 connects the input terminal of cooling water connector 26, cooling water connector
26 output end is connected to the coolant interface of frequency conversion equipment 15 to be measured；
After frequency conversion equipment 15 to be measured runs a period of time, water-cooling apparatus 24 will be opened, by water waveguide 25 and cold
But cooling water is input to the cooling water of frequency conversion equipment 15 to be measured and followed by the coolant interface of water interface 26 and frequency conversion equipment to be measured 15
In ring.
Preferably, in order to avoid frequency conversion equipment to be measured different directions radiation-emitting amount difference caused by experimental result
It influences, the test platform used in the embodiment of the present invention is examined for rotating platform to frequency conversion equipment Electro Magnetic Compatibility to be measured
When survey, test platform rotation can be made to measure all possible experimental result, obtain more accurate test result.
The test system of frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention, the system include：Half electric wave is dark
Room, the test platform being arranged in semi-anechoic chamber, the reception antenna being arranged in semi-anechoic chamber and to be placed on half electric wave dark
Outdoor power supply；The one end for the input power interface being arranged on test platform connects the input terminal of frequency conversion equipment to be measured, change to be measured
The one end for the out-put supply interface being arranged on the output end connecting test platform of frequency equipment；Power supply is connected to input power interface
The other end, for powering for input power interface；The other end connection of out-put supply interface is placed on the survey outside semi-anechoic chamber
Load equipment is tried, the load of test load equipment is adjustable；Reception antenna is connected to the receiver placed outside semi-anechoic chamber, is used for
It detects the radiated transmission power of frequency conversion equipment to be measured and is sent to receiver.In technical solution provided in an embodiment of the present invention, make
The environment to be worked with darkroom simulated frequency conversion equipment or open scene, frequency conversion equipment is tested dark using reception antenna and receiver
The radiated transmission power that room generates when running, to understand the Electro Magnetic Compatibility of the frequency conversion equipment for tester；Darkroom mould
Quasi- environment can fully avoid influence of the external environment to test process, improve the precision of test result；In addition, also using negative
It carries adjustable test load equipment and is connected to the delivery outlet of the frequency conversion equipment, and then the frequency conversion equipment can be tested from zero load to completely
All radiation-emitting situations during load determine that the Electro Magnetic Compatibility of the frequency conversion equipment provides more fully for tester
Data supporting.To sum up, the test system of frequency conversion equipment Electro Magnetic Compatibility provided in an embodiment of the present invention, can be to being applied to coal
High-power frequency conversion equipment in mine carries out the detection of radiation-emitting situation under full power state, and test result is also more than the prior art
It is accurate.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, all answer by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of test system of frequency conversion equipment Electro Magnetic Compatibility, which is characterized in that including：Semi-anechoic chamber, setting are half
Test platform, the reception antenna being arranged in semi-anechoic chamber in anechoic chamber, and the power supply being placed on outside semi-anechoic chamber；
The one end for the input power interface being arranged on the test platform connects the input terminal of frequency conversion equipment to be measured, the change to be measured
The output end of frequency equipment connects the one end for the out-put supply interface being arranged on the test platform；
The power supply is connected to the other end of the input power interface, for powering for the input power interface；
The other end connection of the out-put supply interface is placed on the test load equipment outside the semi-anechoic chamber, the test
The load of load equipment is adjustable；
The reception antenna is connected to the receiver placed outside the semi-anechoic chamber, for detecting the frequency conversion equipment to be measured
Radiated transmission power is simultaneously sent to the receiver.
2. system according to claim 1, which is characterized in that the system also includes input EMI FILTERs；
The input EMI FILTER is arranged between the power supply and the input power interface, and the input electromagnetism
Interference filter is located at outside the semi-anechoic chamber.
3. system according to claim 1, which is characterized in that the system also includes sinusoidal filter and output electromagnetism are dry
Disturb filter；
The sinusoidal filter is arranged between the test load equipment and the out-put supply interface, and the output electromagnetism is dry
Filter is disturbed to be arranged between the sinusoidal filter and the test load equipment；
The sinusoidal filter and the output EMI FILTER are located at outside the semi-anechoic chamber.
4. system according to claim 1, which is characterized in that the power supply is additionally operable to obtain the frequency conversion equipment to be measured
Operating parameter simultaneously judges whether the frequency conversion equipment operation to be measured is normal according to the operating parameter；
If normal, then continue to power, then stop powering if abnormal,；
The operating parameter includes at least：Input voltage, input current, input power factor, output voltage and output current.
5. system according to claim 1, which is characterized in that the reception antenna is additionally operable to measure the semi-anechoic chamber
In background environment electromagnetic noise and be sent to the receiver.
6. system according to claim 1, which is characterized in that the system also includes the first screened rooms；
It includes the reception that first screened room, which is arranged on the outer wall of the semi-anechoic chamber and in first screened room,
Machine.
7. system according to claim 5, which is characterized in that the system also includes secondary shielding rooms；
The secondary shielding room is arranged on the outer wall of the semi-anechoic chamber, and includes the input in the secondary shielding room
EMI FILTER, the sinusoidal filter and the output EMI FILTER.
8. system according to claim 2, which is characterized in that the system also includes change-over switches；
The output end of the change-over switch connects the other end of the input power interface, the first input end of the change-over switch
The input EMI FILTER is connected, the second input terminal of the change-over switch connects the power supply；
The change-over switch is used to determine whether the electric energy that the power supply provides to be laggard by the input EMI FILTER
Enter the input power interface.
9. system according to claim 1, which is characterized in that the system also includes：It is placed on the semi-anechoic chamber
Outer water-cooling apparatus, the water waveguide being placed on outside the semi-anechoic chamber and the cooling water being arranged in semi-anechoic chamber connects
Mouthful；
The water-cooling apparatus connects the water waveguide, and the water waveguide connects the input terminal of the cooling water connector, described cold
But the output end of water interface is connected to the coolant interface of the frequency conversion equipment to be measured.
10. system according to claim 1, which is characterized in that the test platform is rotating platform.
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| CN111988890A (en) * | 2020-10-26 | 2020-11-24 | 南京容测检测技术有限公司 | Light emitting diode lighting equipment power supply for electromagnetic compatibility test |
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Application publication date: 20181109 |